Abstract
We study the quark-gluon plasma produced in nucleus-nucleus collisions where the laboratory kinetic energy goes from 4 to 25 GeV/ nucleon. The strange quark production is analyzed in detail and we look at the possibility for the plasma to lose energy by fireball production. Such fireballs are created inside the plasma via the dominent two-gluon fusion mechanism. Our results disagree with those of Biro and Zimanyi concerning the equilibrium of the strange quark population. A prediction is made for the 15 GeV/nucleon BNL sulfur beam and for uranium-uranium collisions at 25 GeV/nucleon. In the most energetic case of uranium we obtain a saturation ratio of no more than 25%. On the other hand, a low amount of energy carried by the fireballs leads to an important increase of the ratio $${{N_s } \mathord{\left/ {\vphantom {{N_s } {N_{\bar q} }}} \right. \kern-\nulldelimiterspace} {N_{\bar q} }}$$ . Using reasonable values for the parameters, we find that this ratio may reach a value of 3.5 in the most favorable case of uranium.
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